When testing for association with ECG traits using all ECGs irrespective of rhythm and history of atrial fibrillation, p.Ala75Val in RPL3L associates more significantly with ECG measurements and p.Gln254Pro in MYZAP associates with various P wave indices, R amplitude, and T wave indices (Supplementary Fig. 1). This evidence concerns the gene MYZAP and atrial fibrillation.